CN102115294A - Method for treating wastewater containing high-concentration fuel ethanol by utilizing wheat and other gains as main raw materials - Google Patents

Method for treating wastewater containing high-concentration fuel ethanol by utilizing wheat and other gains as main raw materials Download PDF

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Publication number
CN102115294A
CN102115294A CN2010106065285A CN201010606528A CN102115294A CN 102115294 A CN102115294 A CN 102115294A CN 2010106065285 A CN2010106065285 A CN 2010106065285A CN 201010606528 A CN201010606528 A CN 201010606528A CN 102115294 A CN102115294 A CN 102115294A
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anaerobic
marsh gas
tank
effluent
main raw
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CN2010106065285A
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陆浩洋
张晓阳
樊国军
赵印
刘纯显
刘克
王照华
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HENAN TIANGUAN INDUSTRIAL BIOGAS Ltd
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HENAN TIANGUAN INDUSTRIAL BIOGAS Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/133Renewable energy sources, e.g. sunlight
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/30Use of alternative fuels, e.g. biofuels
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/40Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

Abstract

The invention discloses a method for treating wastewater containing high-concentration fuel ethanol by utilizing wheat and other gains as main raw materials. The method comprises the following steps: carrying out anaerobic treatment in an intermediate temperature fermentation upflow anaerobic sludge blanket (UASB) retort by using primary anaerobic treatment and secondary aerobic treatment; after the effluent potential energy of anaerobic effluent is reduced by an energy dissipation jar and partial anaerobic sludge is precipitated, feeding the anaerobic effluent into a pre-aeration pool; and after passing through a sedimentation pool, causing pre-aeration pool effluent to a sequencing batch reactor (SBR) pool for aeration and precipitation so that the effluent reaches the emission standard. Marsh gas generated in an anaerobic fermentation jar can be used as a renewable energy source to be fed into a marsh gas cabinet for marsh gas generation, generated electricity energy can meet sewage treatment electro-requirement and then the residual electricity energy can be supplied for fuel ethanol production. The remained sludge generated in a marsh gas production and sewage treatment process is subjected to concentrated separation and then is dried by using high-temperature tail gas generated in marsh gas generation so as to obtain an organic fertilizer. The method has the advantages of low operation cost and high treatment efficiency, the whole sewage treatment system achieves zero energy supply, the generated electricity energy is slightly remained, and the anaerobic effluent in the operation process has less possibility of incrustation and blockage, thereby achieving the win-win purpose of environment and energy source.

Description

With cereal such as wheats is the alcohol fuel high-concentration waste water treatment process of main raw material
Technical field
The invention belongs to technical field of sewage, being specifically related to a kind of is the alcohol fuel high-concentration waste water treatment process of main raw material with cereal such as wheats.
Grain in storage for years (cereal such as wheat) is carried out biological fermentation, the alcohol fuel of producing is as bioenergy, and the byproduct in the production process carried out precision work, make DDGS feed, gluten powder and biogas, really accomplish Sustainable development and comprehensive utilization comprehensively, it is the processing that main raw material carries out wastewater from fermentation industry that this technology is fit to cereal such as wheats.
Background technology
Along with the further expansion of fossil oil produced quantity, can be for mineral reserve such as the oil that utilizes, Sweet natural gas, coals with fewer and feweri, energy dilemma has become a key factor of each national economic development of restriction and living standards of the people.
With cereal such as grain in storage for years wheats is the raw material production alcohol fuel, at first with the gluten powder of isolating after the wheat flour milling wherein, again the powder slurry is carried out producing fuel ethyl alcohol by ferment.The vinasse that fermentation liquid generates through the distillation back, after solid-liquid separation, the wet poor cylinder oven dry of carrying out, clear liquid heats concentrated.Because content of soluble protein is very high in the clear liquid, clear liquid is dried through heating to join in the solid vinasse after concentrating again, made feedstuff protein content height, be worth high.This class treatment process of vinasse is called DDGS technology, and characteristics are less investments, and the energy consumption height consumes more fossil oil, and certain economic benefits is arranged.In clear liquid concentration and evaporation process, after water of condensation and some other flush pot water and water coolant mixed, COD was about about 4500mg/L, and this waste water enters into treatment center of sewage and carries out anaerobism and two-stage aerobic processing.Owing to contain certain phytate, meeting and Mg under anaerobic environment in the cereal such as wheat 2+And NH 4 +-N generates crystal salt, the just normal struvite of saying, thereby fouling and blocking pipe in pipeline, increase maintenance cost, influence normal sewage disposal, be difficult to make water outlet to reach the first discharge standard of " composite wastewater emission standard " the alcohol industry discharging in (GB8978-1996), and the mud and the biogas that produce also can not get effective utilization, so have the requirement that technology has not satisfied the circulation sustainable economic development of national promotion now.
Summary of the invention
For solving the above-mentioned technical problem that prior art exists, the object of the present invention is to provide a kind of is the alcohol fuel high-concentration waste water treatment process of main raw material with cereal such as wheats.Waste water is realized qualified discharge, the biogas that produces carries out marsh gas power generation, the high-temperature tail gas that marsh gas power generation produces dries mud as fertilizer, have that working cost is low, processing efficiency is high, entire sewage treatment system Zero-energy is supplied with, the electric energy that produces shows a small surplus the less scaling obstruction of anaerobism water outlet in the operational process.
For achieving the above object, the technical solution used in the present invention is: with cereal such as wheats is the alcohol fuel high-concentration waste water treatment process of main raw material, is characterised in that to realize by following processing step:
1, with cereal such as wheat be the alcohol fuel high-concentration waste water of main raw material through after grid and the horizontal sedimentation tank pre-treatment, enter equalizing tank, regulate water inlet and ecotope requirement that water inlet PH satisfies the USAB retort;
2, adopt mesophilic digestion UASB retort to carry out anaerobically fermenting then and produce biogas, PH is 6~8.5, anaerobism water inlet COD control 4500~5500mg/L, and 37 ℃~42 ℃ of leavening temperatures, volumetric loading is controlled at 5~7KgCOD/m 3, biogas enters the biogas cabinet as marsh gas power generation, and the high-temperature tail gas that marsh gas power generation produces is used for the mud oven dry.
3, through entering into preaeration tank by open tank again behind the energy dissipating jar, DO is controlled at 0.5~2.0mg/L, SV earlier in the anaerobism water outlet 30minBe controlled at 20~30%, water outlet enters into the settling tank precipitation and enters into the SBR pond after 2.5~4.5 hours, and SBR pond MLSS is controlled at 2000mg/L~8000mg/L, through aeration and post precipitation qualified discharge;
4, after the excess sludge process sludge dewatering machine room concentrating and separating that generates in biogas production and the sewage treatment process, the high-temperature tail gas oven dry that produces with marsh gas power generation makes fertilizer.
The anaerobism water outlet is introduced into preaeration tank and settling tank, and precipitated outlet water enters into the SBR pond again.
Adopt the beneficial effect of technique scheme: after being the alcohol fuel high-concentration waste water process grid and horizontal sedimentation tank pre-treatment of main raw material with cereal such as wheats, enter equalizing tank, adopt mesophilic digestion UASB retort to carry out anaerobically fermenting then, the anaerobism water outlet enters preaeration tank through the energy dissipating jar, the preaeration tank water outlet enters into SBR pond, qualified discharge after treatment again through the settling tank post precipitation.The anaerobism water outlet enters into SBR pond process again through preaeration and through settling tank, the part anaerobic sludge that the anaerobism water outlet is taken out of changes ecotope under aeration condition, suppressing anaerobic sludge under anaerobic forms methane, improve the deposition efficiency of anaerobic sludge in settling tank, reduce the water inlet COD load in SBR pond.Simultaneously to go out sewage sludge be anoxic condition in preaeration tank to anaerobism, and entering into behind the settling tank is anaerobic state, behind the aeration through the SBR pond, has just formed inversion A 2/ O technology can realize denitrogenation dephosphorizing.---aeration---precipitation---is in the technological process of draining, and the ammonia nitrogen in the sewage can effectively be removed by nitrated/denitrification process of microorganism, has improved the removal effect of ammonia nitrogen greatly and intake in the SBR pond.The energy dissipating jar can reduce the potential energy of anaerobism water outlet, and the part mud that the water outlet of precipitation anaerobism is taken out of also reduces the foam that water impact causes.The water outlet of energy dissipating jar enters into preaeration tank by open stainless steel trough.Because contain a large amount of phytates in the cereal such as wheat, hydrolysis of phytic acid discharges phosphate anion under the anaerobic situation, with calcium, magnesium ion, NH 4 +In conjunction with can generating a large amount of struvites, deposition progressively in pipeline, finally blocking pipe seriously.And the opened type tank is convenient to clearing up in the groove, is difficult for stopping up, and has guaranteed the safe operation continuously of whole technology.The inventive method adopts anaerobism+two-stage aerobic biochemical processing process, and the outer draining after treatment process such as physics, biology are handled can be satisfied " integrated wastewater discharge standard " first discharge standard requirement (GB8978-1996).Anaerobically fermenting+two-stage aerobic is handled high concentrated organic wastewater not only can realize the water outlet qualified discharge, can also form methane in the process of removing COD, carries out marsh gas power generation.The electric energy that produces under the marsh gas power generation normal operation not only can ensure the need for electricity of sewage disposal, and entire sewage treatment system Zero-energy is supplied with, and also has unnecessary electric energy to use for fuel ethanol production.This technology investment is saved, running cost is low, water outlet can qualified discharge, the biogas that produces carries out marsh gas power generation, the high-temperature tail gas that marsh gas power generation produces as fertilizer, changes the mud oven dry sewage disposal and has only and drop into the situation that does not have output, has that working cost is low, processing efficiency is high, entire sewage treatment system Zero-energy is supplied with, the electric energy that produces shows a small surplus, and the anaerobism water outlet is difficult for producing the fouling obstruction in the operational process, really realizes the target of environment and energy doulbe-sides' victory.
Description of drawings
Below in conjunction with accompanying drawing specific embodiments of the invention are described in further detail.
Fig. 1 is the process flow sheet of the inventive method.
Embodiment
As shown in Figure 1 be the alcohol fuel high-concentration waste water treatment process of main raw material with cereal such as wheats, be characterised in that by following processing step and realize:
1, with cereal such as wheat be the alcohol fuel high-concentration waste water of main raw material through after grid and the horizontal sedimentation tank pre-treatment, enter equalizing tank, regulate water inlet and ecotope requirement that water inlet PH satisfies the USAB retort;
2, adopt mesophilic digestion UASB retort to carry out anaerobically fermenting then and produce biogas, PH is 6~8.5, anaerobism water inlet COD control 4500~5500mg/L, and 37 ℃~42 ℃ of leavening temperatures, volumetric loading is controlled at 5~7KgCOD/m 3, biogas enters the biogas cabinet as marsh gas power generation, and the high-temperature tail gas that marsh gas power generation produces is as oven dry mud.
3, through entering into preaeration tank by open tank again behind the energy dissipating jar, DO is controlled at 0.5~2.0mg/L, SV earlier in the anaerobism water outlet 30Be controlled at 20~30%, water outlet enters into the horizontal sedimentation tank precipitation and enters into the SBR pond after 2.5~4.5 hours, and SBR pond MLSS is controlled at 2000mg/L~8000mg/L, through aeration and post precipitation qualified discharge;
4, after the excess sludge process sludge dewatering machine room concentrating and separating that generates in biogas production and the sewage treatment process, the high-temperature tail gas oven dry that produces through marsh gas power generation makes fertilizer.
The anaerobism water outlet is introduced into preaeration tank and settling tank, and precipitated outlet water enters into the SBR pond again.

Claims (2)

1. be the alcohol fuel high-concentration waste water treatment process of main raw material with cereal such as wheats, be characterised in that and realize by following processing step:
1), with cereal such as wheats be the alcohol fuel high-concentration waste water of main raw material through after grid and the horizontal sedimentation tank pre-treatment, enter equalizing tank, regulate water inlet and ecotope requirement that water inlet PH satisfies the USAB retort;
2) adopt mesophilic digestion UASB retort to carry out anaerobically fermenting, then and produce biogas, PH is 6~8.5, anaerobism water inlet COD control 4500~5500mg/L, and 37 ℃~42 ℃ of leavening temperatures, volumetric loading is controlled at 5~7KgCOD/m 3, biogas enters the biogas cabinet as marsh gas power generation, and the high-temperature tail gas that marsh gas power generation produces is used for the mud oven dry;
3), through entering into preaeration tank by open tank again behind the energy dissipating jar, DO is controlled at 0.5~2.0mg/L, SV earlier in the anaerobism water outlet 30minBe controlled at 20~30%, water outlet enters into the settling tank precipitation and enters into the SBR pond after 2.5~4.5 hours, and SBR pond MLSS is controlled at 2000mg/L~8000mg/L, through aeration and post precipitation qualified discharge;
4), the excess sludge that generates in biogas production and the sewage treatment process through sludge dewatering machine room concentrating and separating after, the high-temperature tail gas oven dry that produces with marsh gas power generation makes fertilizer.
2. according to claim 1 is the alcohol fuel high-concentration waste water treatment process of main raw material with cereal such as wheats, and it is characterized in that: the anaerobism water outlet is introduced into preaeration tank and settling tank, and precipitated outlet water enters into the SBR pond again.
CN2010106065285A 2010-12-27 2010-12-27 Method for treating wastewater containing high-concentration fuel ethanol by utilizing wheat and other gains as main raw materials Pending CN102115294A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102643693A (en) * 2012-04-17 2012-08-22 洪亮 Process for producing biogas by utilizing methane-straw gas coproduction device
CN105753285A (en) * 2014-12-18 2016-07-13 鑏详科技有限公司 A waste water sludge drying system and a drying method thereof
CN111099789A (en) * 2019-12-04 2020-05-05 河北首朗新能源科技有限公司 Organic wastewater treatment system and method
CN113277692A (en) * 2021-06-28 2021-08-20 江西科技学院 Reservoir sediment-based purification process

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
朱宜庚等: "燃料乙醇生产废水处理工程", 《给水排水》 *
陈明忠等: "UASB/SBR工艺处理燃料乙醇生产废水工程设计", 《中国给水排水》 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102643693A (en) * 2012-04-17 2012-08-22 洪亮 Process for producing biogas by utilizing methane-straw gas coproduction device
CN102643693B (en) * 2012-04-17 2017-07-04 张书维 The technique that a kind of utilization biogas and the double gas combined production devices of Straw Gas produce biological flue gas
CN105753285A (en) * 2014-12-18 2016-07-13 鑏详科技有限公司 A waste water sludge drying system and a drying method thereof
CN111099789A (en) * 2019-12-04 2020-05-05 河北首朗新能源科技有限公司 Organic wastewater treatment system and method
CN111099789B (en) * 2019-12-04 2021-07-20 河北首朗新能源科技有限公司 Organic wastewater treatment system and method
CN113277692A (en) * 2021-06-28 2021-08-20 江西科技学院 Reservoir sediment-based purification process

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Address after: 473003 No. 1 Tianguan Avenue, Henan, Nanyang

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Application publication date: 20110706